/**
 * #      617
 * 名称   合并二叉树
 * 链接   https://leetcode-cn.com/problems/merge-two-binary-trees
 * 题解   [892](https://leetcode-cn.com/problems/merge-two-binary-trees/solution)
 * 通过率 78.8%
 * 难道   简单
 */

